Polarization insensitive terahertz metamaterial absorber

Grant, J. , Ma, J., Saha, S., Lok, L.B., Khalid, A. and Cumming, D.R.S. (2011) Polarization insensitive terahertz metamaterial absorber. Optics Letters, 36(8), pp. 1524-1526. (doi: 10.1364/OL.36.001524)

Abstract

We present the simulation, implementation, and measurement of a polarization insensitive resonant metamaterial absorber in the terahertz region. The device consists of a metal/dielectric-spacer/metal structure allowing us to maximize absorption by varying the dielectric material and thickness and, hence, the effective electrical permittivity and magnetic permeability. Experimental absorption of 77% and 65% at 2.12 THz (in the operating frequency range of terahertz quantum cascade lasers) is observed for a spacer of polyimide or silicon dioxide respectively. These metamaterials are promising candidates as absorbing elements for thermally based terahertz imaging.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Saha, Dr Shimul and Cumming, Professor David and Lok, Dr Lai Bun and Khalid, Dr Ata-Ul-Habib and Grant, Dr James
• Authors: Grant, J., Ma, J., Saha, S., Lok, L.B., Khalid, A., and Cumming, D.R.S.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Optics Letters
• ISSN: 0146-9592